Petrus Christus, The Nativity, c. 1450, oil on panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/47 Rogier van der Weyden, The Crucifixion with a Carthusian Monk, 1460, oil and gold on wood, Cleveland Museum of Art, Cleveland. https://dartabase.art/cite/cleveland/112856 Master of the Horse Heads, Upright Ornament with Two Sirens, 1453, engraving on laid paper, National Gallery of Art, Washington. https://dartabase.art/cite/nga/8759 Rogier van der Weyden, Medici-Madonna, c. 1453–1460, Mischtechnik auf Eichenholz, Städel Museum, Frankfurt am Main. https://dartabase.art/cite/staedel/846 Petrus Christus, Madonna mit Kind und den Heiligen Hieronymus und Franziskus, 1457, Mischtechnik auf Eichenholz, Städel Museum, Frankfurt am Main. https://dartabase.art/cite/staedel/914 Master d, Saint Matthias and Saint Jude with Articles from the Credo, 1450/1460, metalcut, hand-colored in olive green, dull red lake and yellow, National Gallery of Art, Washington. https://dartabase.art/cite/nga/3921 Master with the Banderoles, Saint Augustine, c. 1450/1460, engraving on laid paper, National Gallery of Art, Washington. https://dartabase.art/cite/nga/8749 Master of the Horse Heads, Children Playing with a Bitch and Three Young Dogs, 1453, etching, National Gallery of Art, Washington. https://dartabase.art/cite/nga/4401 Master of the Horse Heads, Ornament with a Cupid, a Satyr, and Grotesque Figures, 1453, engraving on laid paper, National Gallery of Art, Washington. https://dartabase.art/cite/nga/8758